Storm Rising (Mage Storms #2)

In Storm Rising, mysterious mage-storms are wreaking havoc on Valdemar,
Karse, and all the Kingdoms of the West, plaguing these lands not only
with disastrous earthquakes, monsoons, and ice storms,

Long Synopsis:

In Storm Rising, mysterious mage-storms are wreaking havoc on Valdemar,
Karse, and all the Kingdoms of the West, plaguing these lands not only
with disastrous earthquakes, monsoons, and ice storms, but also with
venomous magical constructs-terrifying creatures out of nightmare.
Both Valdemar's Heralds and Karse's Sunpriests struggle to marshal
their combined magical resources to protect their realms from these
devastating, spell fueled onslaughts. But as the situation becomes
bleaker and bleaker, the still fragile alliance between these
long-hostile lands begins to fray. And when Karal, the young Karsite
envoy to the court of Valdemar, is wrongfully accused of collusion with
the enemy, only the personal intervention of Solaris, the High
Priestess and ruler of Karse, can defuse what is rapidly becoming a
dangerously explosive situation. But Solaris also confirms the worst
fears of the Heralds-that these storms do not come from the Eastern
Empire, but from a completely unknown source. And unless Valdemar and
Karse can locate and destroy the creator of the storms, they may see
their entire world demolished in a final magical holocaust.